Question

Q. light green coloured iron compound (A) when heated in a test tube it gives a brown coloured solid mass (B) and liberates two gases (C) and (D). (B) is also formed during the rusting of iron.
(i) What type of reaction is it? Write formula of A.
(ii) Name the gases evolved.
iii) Write the formula of B.

Answer 1

(I) decomposition reaction.
A - FeSO4
(ii) SO3 and SO2
(iii)Fe2O3
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Answer 2

(i) The reaction involved in this process is decomposition reaction. The formula of A is FeSO₄. (Ferrous Sulphate)

(ii) Sulphur dioxide (SO₂) and Sulphur trioxide (SO₃)

(iii) Ferric oxide (Fe₂O₃)